Giant spin splitting through surface alloying

The long-range ordered surface alloy Bi/Ag(111) is found to exhibit a giant spin splitting of its surface electronic structure due to spin-orbit coupling, as is determined by angle-resolved photoelectron spectroscopy. First-principles electronic structure calculations fully confirm the experimental findings. The effect is brought about by a strong in-plane gradient of the crystal potential in the surface layer, in interplay with the structural asymmetry due to the surface-potential barrier. As a result, the spin polarization of the surface states is considerably rotated out of the surface plane.


Published in:
Physical Review Letters, 98, 186807
Year:
2007
Publisher:
American Physical Society
ISSN:
0031-9007
Keywords:
Laboratories:




 Record created 2010-04-01, last modified 2018-03-17


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